Question

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Answer 1

Answer:

A motion sensor (or motion detector) is the linchpin of your security system because it detects when someone is in your home when they shouldn't be. A motion sensor uses one or multiple technologies to detect movement in an area

Step-by-step explanation:

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Answer 2

1.

a) 8.1 b) 0.27

2.

a) 4.063 b) 10.8

3.

a) 8.625 c) 0.3509